Motorists traveling in Pennsylvania pay the third highest gas tax in the U.S. and a state lawmaker proposes ensuring they ...

Diesel vehicles are supposed to get orange coloured stickers, while petrol and CNG vehicles are required to get light blue ...

Delhi's transport department is set to enforce colour-coded sticker regulations for vehicles, warning of penalties under the ...

Like labels on cigarettes, opponents say fossil fuel warnings could change attitudes. Others call it gasoline “shaming.” ...